Refactor console client to new Govor.ConsoleClient project

Removed Govor.Console implementation and introduced a new Govor.ConsoleClient project with a modular command-based architecture. Added dependency injection, command dispatcher, middleware pipeline, logging, and interactive command support. Updated solution and project files to reflect the new structure.

Govor.ConsoleClient/Commands/ICommand.cs

@@ -0,0 +1,17 @@
+using Govor.ConsoleClient.Services;
+
+namespace Govor.ConsoleClient.Commands;
+
+public interface ICommand
+{
+    Task ExecuteAsync(CommandContext context);
+    string LongHelp();
+    string ShortHelp();
+}
+
+[AttributeUsage(AttributeTargets.Class)]
+public class CommandRouteAttribute : Attribute
+{
+    public string Path { get; }
+    public CommandRouteAttribute(string path) => Path = path;
+}